call premium造句

• Does standard support service include advanced support ( formerly called premium service
  标准支持服务中包含现场服务吗？
• If the forward rate is above the spot rate , the difference is called premium , if the forward rate is below the spot rate , the difference is known as a discount
  如果远期汇率高于即期汇率，其差额叫做升水；如果远期汇率低于即期汇率，其差额叫做贴水。